Use the internet and plant trees!

[Haarek]

I am afraid your efforts are made meaningless with the 50000+ cargo ships burning  5 - 15 tons of low-grade fuel PER HOUR to save money and maintenance cost. The engines of these ships produce more than a 100,000 HP. They are not calculating by gallons per hour, but TONS per hour. 

Don't forget the airplane traffic, at the time of writing this it is approx. 15,000 airplanes in the sky. Where the planes use several tons of fuel just for take-off. How much fuel do you think a 747 uses from a trip to Europe and back? There is constantly over 10,000+ planes in the sky.
https://www.flightradar24.com/ Look at all the planes, realize they are burning several tonns of fuel just for the take-off.
Edit: Here is the statistics of all planes airborne every day for the last 30 days.
https://www.flightradar24.com/data/statistics

Boat traffic as of writing this: 

Then people come tell me I should use a bicycle to get to work and download a browser to plant trees. Ridiculous.